40729288 has 16 divisors (see below), whose sum is σ = 78831360. Its totient is φ = 19707600.

The previous prime is 40729261. The next prime is 40729289. The reversal of 40729288 is 88292704.

It is a self number, because there is not a number n which added to its sum of digits gives 40729288.

It is not an unprimeable number, because it can be changed into a prime (40729289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81868 + ... + 82363.

It is an arithmetic number, because the mean of its divisors is an integer number (4926960).

Almost surely, 2^40729288 is an apocalyptic number.

It is an amenable number.

40729288 is a deficient number, since it is larger than the sum of its proper divisors (38102072).

40729288 is a wasteful number, since it uses less digits than its factorization.

40729288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164268 (or 164264 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 40729288 is about 6381.9501721652. The cubic root of 40729288 is about 344.0611257883.

The spelling of 40729288 in words is "forty million, seven hundred twenty-nine thousand, two hundred eighty-eight".